[Bugfix][Server] In WMS GetFeatureInfo CRS param not mandatory when F…

…ILTER param

The CRS parameter is considered as mandatory in GetFeatureInfo even if the FILTER parameter is used without I and J parameters.

To fix it, set a fake CRS in the parameter when I/J and X/Y parameters are not defined and FILTER parameter is defined.

src/server/services/wms/qgswmsrenderer.cpp

@@ -1093,8 +1093,16 @@ namespace QgsWms
     QgsMapSettings mapSettings;
     std::unique_ptr<QImage> outputImage( createImage( imageWidth, imageHeight ) );
 
+    // The CRS parameter is considered as mandatory in configureMapSettings
+    // but in the case of filter parameter, CRS parameter has not to be mandatory
+    bool mandatoryCrsParam = true;
+    if ( filtersDefined && !ijDefined && !xyDefined && mWmsParameters.crs().isEmpty() )
+    {
+      mandatoryCrsParam = false;
+    }
+
     // configure map settings (background, DPI, ...)
-    configureMapSettings( outputImage.get(), mapSettings );
+    configureMapSettings( outputImage.get(), mapSettings, mandatoryCrsParam );
 
     QgsMessageLog::logMessage( "mapSettings.destinationCrs(): " +  mapSettings.destinationCrs().authid() );
     QgsMessageLog::logMessage( "mapSettings.extent(): " +  mapSettings.extent().toString() );
@@ -1231,7 +1239,7 @@ namespace QgsWms
     return image.release();
   }
 
-  void QgsRenderer::configureMapSettings( const QPaintDevice *paintDevice, QgsMapSettings &mapSettings ) const
+  void QgsRenderer::configureMapSettings( const QPaintDevice *paintDevice, QgsMapSettings &mapSettings, bool mandatoryCrsParam ) const
   {
     if ( !paintDevice )
     {
@@ -1254,6 +1262,10 @@ namespace QgsWms
       crs = QString( "EPSG:4326" );
       mapExtent.invert();
     }
+    else if ( crs.isEmpty() && !mandatoryCrsParam )
+    {
+      crs = QString( "EPSG:4326" );
+    }
 
     QgsCoordinateReferenceSystem outputCRS;
 

src/server/services/wms/qgswmsrenderer.h

@@ -197,9 +197,10 @@ namespace QgsWms
        * Configures map settings according to WMS parameters.
        * \param paintDevice The device that is used for painting (for dpi)
        * \param mapSettings Map settings to use for rendering
+       * \param mandatoryCrsParam does the CRS parameter has to be considered mandatory
        * may throw an exception
        */
-      void configureMapSettings( const QPaintDevice *paintDevice, QgsMapSettings &mapSettings ) const;
+      void configureMapSettings( const QPaintDevice *paintDevice, QgsMapSettings &mapSettings, bool mandatoryCrsParam = true ) const;
 
       QDomDocument featureInfoDocument( QList<QgsMapLayer *> &layers, const QgsMapSettings &mapSettings,
                                         const QImage *outputImage, const QString &version ) const;

tests/src/python/test_qgsserver_wms_getfeatureinfo.py

@@ -347,6 +347,16 @@ def testGetFeatureInfoFilter(self):
                                  urllib.parse.quote(':"NAME" = \'two\''),
                                  'wms_getfeatureinfo_filter_no_width')
 
+        # Test a filter without CRS parameter
+        self.wms_request_compare('GetFeatureInfo',
+                                 '&layers=testlayer%20%C3%A8%C3%A9&' +
+                                 'INFO_FORMAT=text%2Fxml&' +
+                                 'width=600&height=400&' +
+                                 'query_layers=testlayer%20%C3%A8%C3%A9&' +
+                                 'FEATURE_COUNT=10&FILTER=testlayer%20%C3%A8%C3%A9' +
+                                 urllib.parse.quote(':"NAME" = \'two\''),
+                                 'wms_getfeatureinfo_filter_no_crs')
+
     def testGetFeatureInfoTolerance(self):
         self.wms_request_compare('GetFeatureInfo',
                                  '&layers=layer3&styles=&' +

tests/testdata/qgis_server/wms_getfeatureinfo_filter_no_crs.txt

@@ -0,0 +1,14 @@
+Content-Length: 577
+Content-Type: text/xml; charset=utf-8
+
+<GetFeatureInfoResponse>
+ <BoundingBox maxy="44.90143568" maxx="8.20354699" miny="44.90143568" CRS="EPSG:4326" minx="8.20354699"/>
+ <Layer name="testlayer èé">
+  <Feature id="1">
+   <Attribute value="2" name="id"/>
+   <Attribute value="two" name="name"/>
+   <Attribute value="two àò" name="utf8nameè"/>
+   <BoundingBox maxy="44.9014" maxx="8.2035" miny="44.9014" CRS="EPSG:4326" minx="8.2035"/>
+  </Feature>
+ </Layer>
+</GetFeatureInfoResponse>